National Longitudinal Study of Adolescent HealthLongitudinal StudiesSelf ConceptAdolescent BehaviorAdolescent Health ServicesAdolescent PsychologyBody ImageUnited StatesPeer GroupAdolescent DevelopmentHealth StatusQuestionnairesAdolescent MedicineHealth SurveysSex FactorsFriendsRisk-TakingAge FactorsRisk FactorsHealth BehaviorParent-Child RelationsSocioeconomic FactorsSocial SupportAlcohol DrinkingInterpersonal RelationsSubstance-Related DisordersJuvenile DelinquencyCrime VictimsSexual BehaviorViolenceSchoolsLogistic ModelsDepressionPrevalenceCoitusEducational StatusObesitySmokingBody Mass IndexSiblingsMental HealthCross-Sectional StudiesEuropean Continental Ancestry GroupAfrican AmericansSocial EnvironmentPublic HealthResidence CharacteristicsFamily CharacteristicsSexual PartnersRegression AnalysisHealth PromotionHispanic AmericansSexually Transmitted DiseasesCohort StudiesMultivariate AnalysisAgingAttitude to HealthProspective StudiesDelivery of Health CareParentsQuality of LifeOdds RatioParentingPersonality DevelopmentFollow-Up StudiesPregnancy in AdolescenceMarijuana SmokingHealth Knowledge, Attitudes, PracticeHealth PolicySocial ClassPregnancyHealth Services AccessibilityHealth EducationHealth Status DisparitiesHealth Services Needs and DemandChild AbuseFamilyCourtshipHealthInfant, NewbornPubertyInterviews as TopicTime FactorsHealth Care ReformSelf ReportAlcoholismHealth Care SurveysConduct DisorderMental DisordersSuicide, AttemptedNational Health ProgramsMarijuana AbuseSchool Health ServicesFinlandPrimary Health CareChild WelfareNational Institutes of Health (U.S.)Internal-External ControlHealth PlanningStress, Psychological